Significantly reduced TDP and GPU clock.

Some crackling with default OpenAL Soft settings. Fixed by reducing audio frequency to 44100

Thief: Gold used to run flawlessly, but a recent SteamOS update seems to have introduced a major graphical issue when any Steam overlay elements are invoked. The game and the overlay fight and cause rapid white flickering over the whole screen. This makes it impossible to make adjustments to the power settings as the '...' Steam Deck menu can not be seen. Also, as the control layout I use implements an on-screen menu wheel for weapon selection, this flickering makes it incredibly difficult to use. I've tried using Proton Experimental, Proton 9, 7, and 3 and have gotten the same results so I can only assume this is a display driver issue introduced in SteamOS 3.6.